Your Privacy | Public DNS | Google for Developers (2024)

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This document provides important information about the data that we collectwhen you use Google Public DNS, how long we store it, and how we use it. Youcan also read our Terms of Service.

Our Commitment

We take your privacy very seriously. Google Public DNS adheres to theGoogle Privacy Policy. Moreover, Google does not use any personalinformation collected through the Public DNS service to target ads.

We do not correlate or associate personal information in Google Public DNSlogs with your information from use of any other Google service except foraddressing security and abuse.

Information that we collect

The information that we collect about your DNS queries is stored in two typesof logs, each detailed below:

Temporary DNS Logs

Temporary logs are the only logs that store both your IP address and your DNSquery. Specifically, the temporary logs include:

the IP address of your device sending the DNS query
the technical information collected for Permanent Logs (see below)
for DNS-over-HTTPS (DoH): the Content-Type and Accept HTTP headers

These logs are subject to our deletion processes within 24-48 hours. They areonly used for the following reasons:

to identify and mitigate security threats or activity that we deem abusiveor otherwise malicious,
to fix, maintain, and improve Google DNS services, and
to generate aggregate non-personally identifiable DNS usage summaries.

To address security and abuse issues, we may retain information from thetemporary logs for longer than 48 hours, in each case solely for the limitedpurpose of resolving such issues.

Permanent DNS Logs

The permanent logs are a sampling of the temporary logs where your IP addressis removed and replaced by a city or region-level location. Thus, thepermanent logs contain no personal information about you. The followinginformation is logged in the permanent logs:

Requested domain name
Request type (A , AAAA , NS, MX, TXT, etc.)
Request Size
Transport protocol (TCP, UDP, TLS, or HTTPS)
Client's autonomous system number
User's geolocation: country, region, and city (no more specific than 1 km²and 1000 users)
DNS Response code
Google DNS server information
Timestamp
Processing time
Response DNS flags (including AD, CD, DO, RD, and TC)
Response size
EDNS version
EDNS option
EDNS Client Subnet (ECS) (IP protocol and prefix length -- excluding theclient IP address)
For DNS-over-HTTPS (DoH):
- Version string corresponding to HTTP path (/dns-query or /resolve)
- Response HTTP encoding, such as application/dns-message or json

Previous Versions

You can see all past versions of this policy.

Except as otherwise noted, the content of this page is licensed under the Creative Commons Attribution 4.0 License, and code samples are licensed under the Apache 2.0 License. For details, see the Google Developers Site Policies. Java is a registered trademark of Oracle and/or its affiliates.

Last updated 2022-10-06 UTC.